<template>
    <div class="login-page">
        <div class="card">
            <div class="card-header">
                <h2>学生综合管理系统</h2>
            </div>
            <div class="card-body">
                <form @submit.prevent="Login">
                    <div class="form-group">
                        <label for="username">用户名</label>
                        <input
                            type="text"
                            id="username"
                            v-model="userId"
                            placeholder="请输入用户名"
                        />
                    </div>
                    <div class="form-group">
                        <label for="password">密码</label>
                        <input
                            type="password"
                            id="password"
                            v-model="password"
                            placeholder="请输入密码"
                        />
                    </div>
                    <button type="submit" :disabled="loading">登录</button>
                </form>
            </div>
            <div v-if="errorMessage" class="error-message">
                <!--                {{ errorMessage }}-->
            </div>
        </div>
    </div>
</template>

<script>
import userManager from "@/UserManager";
import request from "@/utils/request";
import { Message } from "element-ui";

export default {
    data() {
        return {
            loading: false,
            userId: '',
            password: '',
            errorMessage: '', // 错误信息
        };
    },

    methods: {
        async Login() {
            this.loading = true;
            this.errorMessage = '';

            const LoginRequest = {
                account: this.userId,
                password: this.password
            };

            try {
                const res = await request.post("/login", LoginRequest);

                if (res.data.code === 200) {
                    localStorage.setItem('token', res.data.data.token);
                    userManager.setUserId(res.data.data.account);
                    userManager.setPermissions(res.data.data.role);
                    this.$router.push('/system');  // 登录成功后跳转到首页
                } else {
                    this.errorMessage = '登录失败';  // 显示错误信息
                    this.showError(this.errorMessage);
                }
            } catch (error) {
                this.errorMessage = '登录请求失败';
                this.showError(this.errorMessage);
            } finally {
                this.loading = false;
            }
        },

        showError(message) {
            Message.error({
                message,
                duration: 3000 // 持续时间为3000毫秒（3秒）
            });
        },
    }
};
</script>
<style scoped>
.login-page {
    padding: 30px;
    background-color: #f9f9f9;
    min-height: 100vh; /* 确保页面高度至少为视口高度 */
    display: flex;
    justify-content: center;
    align-items: center;
}

.card {
    max-width: 400px; /* 调整卡片宽度 */
    width: 100%;
    padding: 20px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.1);
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden; /* 确保圆角生效 */
}

.card-header {
    padding: 8px 16px; /* 可以稍微减少内边距 */
    font-size: 12px; /* 使标题更小 */
    font-weight: bold;
    text-align: center;
}


.card-body {
    padding: 20px;
}

.form-group {
    margin-bottom: 1em;
}

label {
    display: block;
    margin-bottom: 0.5em;
    color: #333;
}

input {
    border: 1px solid #ccc;
    padding: 0.5em;
    width: 100%;
    box-sizing: border-box;
    border-radius: 4px; /* 添加圆角 */
}

button {
    padding: 0.7em;
    background-color: #409eff;
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 5px;
    width: 100%;
}

button:hover {
    background-color: #66b1ff;
}

.error-message {
    color: red;
    font-weight: bold;
    text-align: center;
    margin-top: 10px;
}
</style>
